Buffer changes from Interest List.

me/helpers/StorageInterestManager.java

@@ -0,0 +1,84 @@
+package appeng.me.helpers;
+
+import java.util.LinkedList;
+import java.util.Set;
+
+import appeng.api.storage.data.IAEStack;
+import appeng.me.storage.ItemWatcher;
+
+import com.google.common.collect.SetMultimap;
+
+public class StorageInterestManager {
+	
+	class SavedTransactions {
+		public final boolean put;
+		public final IAEStack stack;
+		public final ItemWatcher iw;		
+
+		public SavedTransactions( boolean putOperation, IAEStack myStack, ItemWatcher watcher )
+		{
+			put = putOperation;
+			stack = myStack;
+			iw = watcher;
+		}
+	};
+
+	private final SetMultimap<IAEStack, ItemWatcher>  container;
+	private LinkedList<SavedTransactions> transactions = null;
+	
+	public StorageInterestManager(SetMultimap<IAEStack, ItemWatcher> interests) {
+		container = interests;
+	}
+
+	public void enableTransactions()
+	{
+		transactions = new LinkedList();
+	}
+
+	public void disableTransactions()
+	{
+		LinkedList<SavedTransactions>  myActions = transactions;
+		transactions = null;
+
+		for ( SavedTransactions t : myActions )
+		{
+			if ( t.put )
+				put( t.stack, t.iw );
+			else
+				remove( t.stack, t.iw );
+		}
+	}
+	
+	public boolean containsKey( IAEStack stack )
+	{
+		return container.containsKey( stack );
+	}
+	
+	public Set<ItemWatcher> get( IAEStack stack )
+	{
+		return container.get( stack );
+	}
+
+	public boolean put( IAEStack stack, ItemWatcher iw )
+	{
+		if ( transactions != null )
+		{
+			transactions.add( new SavedTransactions( true, stack, iw ) );
+			return true;
+		}
+		else
+			return container.put( stack, iw );
+	}
+
+	public boolean remove( IAEStack stack, ItemWatcher iw )
+	{
+		if (  transactions != null )
+		{
+			transactions.add( new SavedTransactions( true, stack, iw ) );
+			return true;
+		}
+		else
+			return container.remove( stack, iw );
+	}
+
+}